<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../../vue.js"> </script>
</head>

<body>
  <div id="app">
    <h1>{{msg}}</h1>
  </div>

  <script>
       Vue.config.productionTip=false;
    const vm = new Vue({
   
      el: "#app",
      data() {
        //返回一个对象
        return {
          msg: "哈哈",
          isHot:true//在实例上添加属性
        }
      }
    })
    console.log(vm);
  </script>
</body>

</html>